Optimum Tilt Angles of Flat-plate Solar Collectors at Riyadh, Kingdom of Saudi Arabia (original) (raw)

2012, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects

A generalized analytical model was developed to determine the optimum tilt angle of flat-plate solar collectors for any location worldwide. The developed analytical model was found to be directly related to the latitude of the location under consideration, the declination angle ı of the earth axis, and the day hour angle at sunset at any day throughout the year. The optimum tilt angleˇo pt was mathematically expressed byˇo pt D tan 1 OEftan ı. ! s =180/g= sin ! s. This model was applied to Riyadh, Kingdom of Saudi Arabia. The results were compared with those calculated by NASA, and showed very good agreement.

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